22742378 has 8 divisors (see below), whose sum is σ = 34211268. Its totient is φ = 11338624.

The previous prime is 22742371. The next prime is 22742381. The reversal of 22742378 is 87324722.

It can be written as a sum of positive squares in 2 ways, for example, as 21687649 + 1054729 = 4657^2 + 1027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22742371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15401 + ... + 16812.

Almost surely, 2^22742378 is an apocalyptic number.

22742378 is a deficient number, since it is larger than the sum of its proper divisors (11468890).

22742378 is a wasteful number, since it uses less digits than its factorization.

22742378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32568.

The product of its digits is 37632, while the sum is 35.

The square root of 22742378 is about 4768.8969374479. The cubic root of 22742378 is about 283.3209077211.

The spelling of 22742378 in words is "twenty-two million, seven hundred forty-two thousand, three hundred seventy-eight".